following upgrade of 8.3.2sp4 to 8.5sp2 Install Shield fails on plug-in installation

Following the upgrade of our dev/test environment from 8.3.2sp4 to
8.5sp2, the Hyperion Intelligence (Insight) plug-in installer does not work.

Clicking on the bqy icon causes the installation process to start--we
get the "Checking Hyperion Intelligence Client..." window and the
normal browser warnings and question about are you sure you want to
install this sofware, and then the installshield wizard begins.
Eventually we get an error dialog box for InstallShield (R) Setup
Launcher which says
"InstallShield (R) Setup Launcher has encountered a problem and needs to
close. We are sorry for the incovenience."

You can click a link for more information which brings up another
dialogue box which gives the AppName as setup.exe with version
7.1.100.1248 and the ModName and ModVer the same. Futher clicking on
the more technical information link gives an exception report and gives
a dump of system info from a Windows error report that you can't
actually access or copy from the dialogue box.

We tried downloading the files directly from the server and running the
installation locally and that seemed to work. However, when I
deinstalled the client and tried again from the web, I got the same
result as before. Then I reinstalled locally again and this time it
appeared to start all right, but the section panes in the client UI were
blank.

Hi Mike,
We have gone through a similar experience and have found a work
around that works for most users. In our environment, if you go
to your IE Options, then click on the Advanced Tab and check the
box next to "Enable Install on Demand (Internet Explorer)", the
install will work. We tell our users to reset their options
back to the way they were initially.

We did have a small subset of users that were unable to install
the plug-in, even with this work around. We ended up having to
push the plug-in to them.